Apparatus for forming sheet glass



Jan, 3, 1928.

L. BOUDIN APPARATUS FOR FORMING SHEET GLASS Original Filed Oct. 5, 1925grwentoz 100/5 BOUD/M Q to gravity Patented Jan. 3, 1928.

UNITED STATES LOUIS IBOUDIN, OF ST.-GOBAIN,

PATENT OFFICE.

rmcn, ASSIGNOB 'ro 800mm ANONYME mas MANU- IACTUBES DE GLACES & PBODUITSCHIMIQU 'ES DE SAINT-GOBAIN, CHAUNY' 8c -(IIIB'EY, OF PARIS, FRANCE.

APPARATUS FORMINGSHEET GLASS.

Application filed October 5, 1925, Serial No. 80,597,

and in France October 10, 1924. Renewed March 81,

Among the known processes for the manufacture of glass there is onewhich embodies flowing the glass through a horizontal slot in the sidewall of the furnace over and down an inclined weir by whichit isdelivered to rolls. Difiiculty has here-- tofore been experienced inthis process in that the upper surface of the glass moving on the weirhas a different temperature 1 from that of the bottom surface which isin contact with the weir, and hence difiiculty has been experienced inthe fabrication of sheets. I pro ose to overcome these defects by.enclosing t e glass from the time of issuance from the furnace slot tothe time of its passage between the rolls in a heated chamber closed onfour sides, one

end of the chamber being against the furnace wall around the slot, andthe other end 0 terminating at the rollers, the side walls'of thechamber bein laterally adjustable to vary the width 0 the weir and thusthe width of the stream of glass entering between the rolls. For thispurpose my in- 2 vention consists in the construction, ar-

rangement and combination of the several parts of which it is composedand will be hereinafter more fully described and claimed.

Referring to the accompanying drawings in which corresponding parts are'de signated bycorresponding marks of referen? 1 re tion tl iroughinvention.

Figure 2 is a transverse vertical section on lines A-A thereof. I

Figure 3 is a longitudinal section through one of the cheek blocks. Fire 4 is a transverse section on the line B of Figure 3.' a

In the drawing 6 represents the outer wall of a glass 1 is alongitudinally vertical seccontainer, preferably the end wall of aforehearth of a glass furnace.

Located in this wall are tory blocks ca spaced a art and forming betweenthem a horizonta 1y elongated slot at throu h which glass may issueunder head from the forehearth. The inable an apparatus embodying my thehollow refrac terior of these blocks may be heated either directly byflames or by circulation of products of combustion therethrough.

Against the outside of the block 0 forming the lower lip of the slot isthe inclined hollow weir block f, over which is located at. a distancesomewhat greater than the width of the slot itself, the hollow coverblock g. Located between the blocks and i. are the cheek blocks 72. alsohollow. v hese locks may be heated by flame or products of combustioncirculating through their in terior as are the blocks 0. In F igures 3and 4, I have shown the cheek blocks as provided with ports 7', throughwhich flame from the burners 23 may be directed, as suit able bafile Itbeing within each block to direct the products of combustion adjacent tothe lower and inner faces of the block before such products emerge fromblock.

Opposite the open end of the chamber formed by the hollow blocks f g andh are the formmg rollers d and e, driven in any suitable manner and ofany approved construction, .the outer ends of the cheek blocks beingshaped to accommodate them to the contour of the rollers.

The cheek blocks :h are laterally ad'ustbetween the top and bottom blocsf "and g, and thus serve to regulate the effective widths of the lasspassage over the weir f and thus of t e stream of glass delivered to therolls. They also may serve when brought closely together as a closingdevice for the slot a.

7 It will be thus seen that I have provided means whereby glass afterits issuance from the slot and prior to its entry between the rolls ismaintained at uniform temperature \conditions on all sides and at thesame time, whereby the width of the stream of glass delivered to therollers may be varied.

Having thusdescribed my invention what I claim as new and desire tosecure by Letters Patent is 1. The combination with a container having aflow slot therein; of rolls; a heating chamber intermediate'of a slotand rolls, the bottbm of the chamber forming a weir between the slotand'rolls', and the side walls 100 of the chamber being laterallyadjustable to and from each other.

2. The combination Witha container for molten glass having a feed slottherein, of 5 forming rollers, a chamber interposed between the slot andthe rollers and formed 01 blocks having internal cavities whereby fromeach other.

Intestimony whereof I hereunto afilx m slgnature.

LOUIS BOUDIN.

